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EVPN Convergence time in a Multihome setup is about 20 seconds. 2 slow

EVPN Convergence time in a Multi home setup is about 20 seconds. It's too slow.

I have one CE  connected to two PE1 and PE1.

PE1 and PE1 are connected to the MPLS core. From MPLS core there is another PE3. I'm running an 10G RFCtest between the Customer 1 device and Customer 2 device. 

I'm testing resiliency, and see how fast it can converge. Currently, both PEs are load balancing the traffic. When I reload PE1,   PE2 start to pass all the traffic. The problem is that when PE2 is about to reestablish the BGP neighborship with the RRs  PE1 stops passing traffic. Once PE2 finally reestablish BGP peers with the router reflectors, traffic starts to pass normally.   I'm read a tons of documents about how to improve the convergence time. the only one that made sense to me is the "bgp graceful-restart"

This is an ALL active MH secenario. With an ethernet segment.  I'm about to lab this with with the startup cost-in command to see if will help.    my question is are there any good articles that talk about SPECIFICALLY ALL ACTIVE MULTIHOME WITH BUNDLE scenerio that talks about improving the convergence time.  or a configuration that you will recommend.  I read 

 

 

 

1 Accepted Solution

Accepted Solutions

I found the solution. Once I applied the  core-isolation-group  the convergence time dropped to ms

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